Method and means for a high power solar cell

The present invention relates to a method and means for improving the efficiency of generating electric power by improving the solar cell (2), 30). The best mode of the present invention, the solar cell layers (200, 201, 202, 203) one or two photon filters of the present invention between the respective (100, 101) double or triple junction tandem solar cell with a (20, 30) It is considered to be. Photon filter (100, 101, 102) is λxBoIt is arranged to reflect photons with a shorter wavelength, the photon filter (100, 101, 102) of small area apertures on the opposite side (140, 141) and the focusing of the low energy photons out, λxBy being arranged on the other side of the longer wavelength reflecting at least some of the photons (150, 151) to the photon filter (100, 101), λxIt is arranged to be transparent to photons of longer wavelength. Solar cell layers (200, 201, 202 and 203) by using the photon filters of the invention connecting (100, 101 and 102) between the photons quantum efficiency of the solar cell layer (QE), the sun in the best air support cells It may be trapped between the layers of the filter.